Ubuntu 6.06 LTS / 7.04 / 7.10 / 8.04 LTS : postfix vulnerability (USN-636-1)

Medium Nessus Plugin ID 33941


The remote Ubuntu host is missing one or more security-related patches.


Sebastian Krahmer discovered that Postfix was not correctly handling mailbox ownership when dealing with Linux's implementation of hardlinking to symlinks. In certain mail spool configurations, a local attacker could exploit this to append data to arbitrary files as the root user. The default Ubuntu configuration was not vulnerable.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected packages.

Plugin Details

Severity: Medium

ID: 33941

File Name: ubuntu_USN-636-1.nasl

Version: $Revision: 1.12 $

Type: local

Agent: unix

Published: 2008/08/20

Modified: 2016/05/27

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 6.2

Temporal Score: 5.4

Vector: CVSS2#AV:L/AC:H/Au:N/C:C/I:C/A:C

Temporal Vector: CVSS2#E:ND/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:postfix, p-cpe:/a:canonical:ubuntu_linux:postfix-cdb, p-cpe:/a:canonical:ubuntu_linux:postfix-dev, p-cpe:/a:canonical:ubuntu_linux:postfix-doc, p-cpe:/a:canonical:ubuntu_linux:postfix-ldap, p-cpe:/a:canonical:ubuntu_linux:postfix-mysql, p-cpe:/a:canonical:ubuntu_linux:postfix-pcre, p-cpe:/a:canonical:ubuntu_linux:postfix-pgsql, cpe:/o:canonical:ubuntu_linux:6.06:-:lts, cpe:/o:canonical:ubuntu_linux:7.04, cpe:/o:canonical:ubuntu_linux:7.10, cpe:/o:canonical:ubuntu_linux:8.04:-:lts

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2008/08/19

Reference Information

CVE: CVE-2008-2936

BID: 30691

USN: 636-1

CWE: 264